distance between focus and directrix given

2:30

34:54

4:06

2:10

9:47

4:00

11:28

6:21

9:11

1:34

2:22

14:59

3:43

8:18

1:00:16

3:57

4:34

5:28

7:19

16:19

16:13

8:33

6:13

8:35

3:58

3:46

4:51

5:00

3:01

11:46

6:36

9:40

9:26

18:28

2:43

4:43

8:52

10:16

9:30

2:48

2:59

14:31

17:14

5:04

14:09

8:14

58:17

4:57

9:45

5:58

3:58

5:19

42:10

34:50

10:38

13:23

6:50

5:08

4:09

18:03